Back when I lived alone in an apartment I never bothered with what I considered non-essentials. There was a plastic plant hanging in the corner of the main room that was left from the previous tenant. And that’s about it. No pictures, no knickknacks, nothing to look at except a couch, a chair and the TV.
If it weren’t for my wife, our house would not have any decor at all. Thankfully, she enjoys adding interesting touches to our house such as old spice cans.